https://www.cnet.com/news/apple-store-down-ahead-of-ipad-event/

Here's a recap of what Apple is anticipated to announce in Brooklyn. Note that these are all rumored -- nothing is confirmed:

Apple announced the event a few weeks ago with a whole variety of different invitation designs. The event will take place at Brooklyn Academy of Music, which hosts theater, dance, music and other programs throughout the year. It's the second time this year Apple has hosted a launch event outside its Silicon Valley home, following its education event in Chicago in March.